The University of Michigan Researchers Have Found That __________

question 41

Multiple Choice

The University of Michigan researchers have found that __________.

• A) rates of illicit drug use in schools that have drug-testing programs were significantly lower than in schools that do not have such programs
• B) rates of illicit drug use in schools that have drug-testing programs were significantly higher than schools that do not have such programs
• C) schools that have drug-testing programs have equivalent illicit drug use rates to those of schools that do not have such programs
• D) while illicit drug use is significantly lower in schools which have drug-testing programs, licit drug use is significantly higher than in schools that do not have such programs

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Definitions:

Confidence Estimate

A range of values used to estimate a parameter, calculated in such a way that it is likely, to a specified level of confidence, to contain the true value of the parameter.

Confidence Interval

A set of values, calculated from sample statistics, predicted to hold the value of an unobserved population parameter.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values, indicating how much the values differ from the mean.

T-Distribution

A probability distribution used in statistics that arises when estimating the mean of a normally distributed population in situations where the sample size is small and population variance is unknown.